I think it may be something to do with the font antialiasing. When I go to 100% scaling with no AA, it looks similarly garbled to 125% with subpixel AA enabled. I'm not sure if that's 100% of the issue, but it might be a worthwhile lead to chase.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-control-center in Ubuntu. https://bugs.launchpad.net/bugs/1795483 Title: Experimental setting to enable fractional Hi-DPI scaling offers no option larger than 200% on 15.6 inch, 3840 x 2160 pixel display (Dell XPS 15 9575) Status in gnome-control-center package in Ubuntu: Confirmed Bug description: On my laptop's 15.6 inch, 3840 x 2160 pixel (282 PPI) display, the available scaling options in the gnome-control-center (version: 1:3.30.0-0ubuntu1, on Cosmic) display settings are limited to 100, 200, 300, and 400%. This is insufficient as 200% is too small and 300% is too large. The missing fractional scaling options are dealt with in bug #1687246. However, the currently available experimental feature to enable fractional scaling (provided in the bug description of #1687246) does not solve the problem on my machine: gsettings set org.gnome.mutter experimental-features "['scale-monitor- framebuffer']" After applying and rebooting, the options offered change to 100, 125, 150, 175, and 200%. Note that there is no value larger than 200% which is too small on this display at least for me. In addition, the 25% steps enabled by the experimental option seem too far apart. With 200%, I am using a font scaling value in Gnome Tweaks of 1.20, so I suppose a fractional scaling of approx 240% would be equivalent. In bug #1687246, Daniel van Vugt (vanvugt) advised to open a new bug for gnome-control-center and added that "gnome-control-center seems to limit the scale to 200% on some machines, 300% on others. And I think I have seen 400% offered in some cases. I don't know why, but the inconsistency is definitely annoying." ProblemType: Bug DistroRelease: Ubuntu 18.10 Package: gnome-control-center 1:3.30.0-0ubuntu1 Uname: Linux 4.19.0-041900rc5-generic x86_64 ApportVersion: 2.20.10-0ubuntu11 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Mon Oct 1 19:29:11 2018 InstallationDate: Installed on 2018-09-13 (17 days ago) InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Alpha amd64 (20180912) SourcePackage: gnome-control-center UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1795483/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
